40673521 has 8 divisors (see below), whose sum is σ = 46522880. Its totient is φ = 34833888.

The previous prime is 40673497. The next prime is 40673531. The reversal of 40673521 is 12537604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40673521 - 2⁷ = 40673393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40673521.

It is not an unprimeable number, because it can be changed into a prime (40673531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13600 + ... + 16318.

It is an arithmetic number, because the mean of its divisors is an integer number (5815360).

Almost surely, 2^40673521 is an apocalyptic number.

It is an amenable number.

40673521 is a deficient number, since it is larger than the sum of its proper divisors (5849359).

40673521 is a wasteful number, since it uses less digits than its factorization.

40673521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 40673521 is about 6377.5795565402. The cubic root of 40673521 is about 343.9040232744.

The spelling of 40673521 in words is "forty million, six hundred seventy-three thousand, five hundred twenty-one".